package innerclasses;
import static net.mindview.util.Print.*;

/**
 * 闭包
 * @author
 *
 */
interface Incrementable{
	void increment();
}
class Callee1 implements Incrementable {

	private int i = 0;
	
	@Override
	public void increment() {
		i++;
		print(i);
	}
}
class MyIncrement {
	public void increment() {
		print("Other operation");
	}
	static void f(MyIncrement mi){
		mi.increment();
	}
}
class Callee2 extends MyIncrement {
	private int i =0;
	public void increment() {
		super.increment();
		i++;
		print(i);
	}
	private class Closure implements Incrementable {
        
		@Override
		public void increment() {
			Callee2.this.increment();
		}	
	}
	Incrementable getCallbackReference() {
		return new Closure();
	}
}
class Caller {
	private Incrementable callbackReference;
	Caller(Incrementable cbh) {
		callbackReference =cbh;
	}
	void go(){
		callbackReference.increment();
	}
}
public class Callbacks {
	public static void main(String[] args) {
		Callee1 c1 = new Callee1();
		Callee2 c2 = new Callee2();
		MyIncrement.f(c2);
		Caller caller1 = new Caller(c1);
		Caller caller2 = new Caller(c2.getCallbackReference());
		caller1.go();
		caller1.go();
		caller2.go();
		caller2.go();
	}
}
